In　order　to　explore　the　effect　of　in-situ　ceramic　particles　on　the　microstructure　and　properties　of　nickel-based　composite　coatings,　the　nickel-based　coatings　reinforced　by　the　in-situ　ceramic　were　prepared　on　the　surface　of　40CrNiMo　steel　using　laser　cladding　technology.　On　the　basis　of　NiCrBSi　(Ni45)　powder,　0　wt%,　5　wt%,　10　wt%,　15　wt%,　and　20　wt%　of　B4C　and　ferrovanadium　(FeV50)　were　added,　which　the　atomic　ratio　of　V　to　C　was　1:1.　Microstructure　and　phase　analysis　were　carried　out　by　metallographic　microscope　(OM),　X-ray　diffractometer　(XRD),　and　scanning　electron　microscope　(SEM).　The　results　show　that　the　NiCrBSi　coating　without　B4C　and　FeV50　are　mainly　composed　of　?-Ni,　Cr23C6,　Cr7C3,　and　CrB　phases.　After　adding　B4C　and　FeV50,　the　matrix　is　mainly　composed　of　?-Ni(Fe)　solid　solution,　and　strengthening　phases　such　as　CrB2　and　VB2　appear　in　the　coating.　With　the　increase　of　the　B4C　and　FeV50,　the　amount　of　CrB2　and　VB2　increased,　and　the　hardness　and　wear　resistance　were　improved.　When　the　addition　amount　of　B4C　and　FeV50　is　10　wt%,　the　in-situ　reinforced　particles　were　uniformly　distributed　and　the　wear　resistance　of　the　coating　was　the　best　and　was　about　15　times　that　of　Ni45　coating.